Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
chieu sang » chieu sach, chieu xanh, hieu lang
hoc chieu » hoc thieu, ho chieu, hoc hien
manh tung » manh hung, thanh tung
cua nhung » va nhung
tung cua » trung cua, tuong cua, dung cua
cong tac » cong ty
toan cau » toan ban, toan tap, toan tai
toan cao » toan ban, toan tap

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu sang - manh tung cua nhung cong tac ((toan cau) OR (toan cao))~.
• Adding a wildcard symbol may retrieve word variants: hoc chieu sang - manh tung cua nhung cong tac ((toan cau) or (toan cao))*.